When planning for a cruise vacation, what do most potential passengers want to know? First and foremost, figuring out the costs associated with cruising is a biggie, like what's included in the fares (and what's not), and how to save money on bookings. Then there's the decision of whether to go it alone and book your cruise online or to use a trusted travel agent to seal the deal. Finally, there are specific considerations for cruisers with special interests and lifestyles who are looking to pin down their perfect cruise vacation match.